BC played hard and made it interesting at times, but they never led during the game and couldn't pull out the upset against UNC. The Tar Heels are a good team with a lot of talent. That is the main story. But as to why BC lost this one: it came down to rebounding and turnovers.
The rebounding was frustrating to watch too. Every time BC cut the lead, UNC would seemingly extend it again off of a rebound. The offensive boards weren't great either. It seemed that BC was so focused on defending the transition, they gave up some second chance points.